Jimmy Boston is an actor and celebrity that Luis Lopez, Armando and Henrique talk about while on a friend activity. Armando and Henrique are great fans, and are jealous when they learn that Luis introduced his sister to him at Maisonette 9, only for her to corner him and "tell him how miserable her life is".
In GTA V, Jimmy Boston is heard from on the talk show Chattersphere in an interview with Michelle Minx and Lazlow about his new show Life Guard. At the end of the interview, Boston says goodbye and then yells "Kifflom!" revealing he's part of the Epsilon Program.
Once Michael De Santa has collected the cars needed for the Epsilon Program, Jimmy Boston is met in person during the side mission Chasing the Truth where he helps find "alien artifacts" for Epsilon with Marnie and Michael.
- He's one of the honored celebrities on the Vinewood Walk of Fame.